presenter refactoring

apps/api/src/domain/race/presenters/CommandResultPresenter.ts

@@ -0,0 +1,36 @@
+export interface CommandResultViewModel {
+  success: boolean;
+  errorCode?: string;
+  message?: string;
+}
+
+export class CommandResultPresenter {
+  private result: CommandResultViewModel | null = null;
+
+  presentSuccess(message?: string): void {
+    this.result = {
+      success: true,
+      message,
+    };
+  }
+
+  presentFailure(errorCode: string, message?: string): void {
+    this.result = {
+      success: false,
+      errorCode,
+      message,
+    };
+  }
+
+  getViewModel(): CommandResultViewModel | null {
+    return this.result;
+  }
+
+  get viewModel(): CommandResultViewModel {
+    if (!this.result) {
+      throw new Error('Presenter not presented');
+    }
+
+    return this.result;
+  }
+}